@article{JLT_1992_2_1_a9,
     author = {M. Stroppel},
     title = {Endomorphisms of {Stable} {Planes}},
     journal = {Journal of Lie theory},
     pages = {075--084},
     year = {1992},
     volume = {2},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JLT_1992_2_1_a9/}
}